CN111623362A - Atmospheric diffusion type VOC tail gas combustion device and combustion method thereof - Google Patents

Abstract

The invention relates to an atmospheric diffusion type VOC tail gas combustion device, comprising a combustion device body and a VOC air intake pipe communicated with the combustion device body, and is characterized in that the combustion device body includes an outer box body and an inner box with a natural suction port body; the output end of the VOC air intake pipe passes through the outer box body and penetrates into the inner box body; the top of the outer box body is set as a Laval nozzle structure to form a first exhaust port; the interior of the inner box body The top is provided with a second exhaust port, and the bottom is provided with a combustion component for burning VOC gas. The technical solution disclosed in the present invention effectively solves the problem of insufficient VOC combustion in the traditional method of directional delivery of quantitative air; effectively eliminates the odor in the production workshop and improves the working environment of the workshop.

Description

A kind of atmospheric diffusion type VOC tail gas combustion device and combustion method thereof

The invention relates to the technical field of VOC tail gas treatment, in particular to an atmospheric diffusion type VOC tail gas combustion device and a combustion method thereof.

Background technique

With the development of my country's industrialization to a certain stage, environmental pollution has become an increasingly prominent social problem, especially in many organic chemical plants, when storage and transportation plants store organic liquids that are considered to be non-toxic, natural volatilization directly enters the atmosphere. seriously pollute the environment. Among them, there are volatile organic compounds VOC gas. At this stage, some enterprises are dealing with it by burning;

However, the current combustion devices generally have several problems:

First, in the existing combustion device, the exhaust fan is usually used to deliver a certain amount of air to the interior to achieve the combustion of a certain proportion of VOC mixed gas; but in actual use, the concentration of VOC mixed gas is constantly changing. Therefore, the traditional method of directional delivery of quantitative air has the phenomenon of VOC and insufficient combustion, resulting in unbearable odor in the production workshop and poor working environment in the workshop;

Second, the existing combustion device only uses combustion to treat the VOC exhaust gas. When the flow rate of the VOC gas entering the combustion chamber is too fast and/or the concentration is high, the combustion device alone is not enough to completely treat the VOC gas. ;

Third, in actual use, the concentration of the VOC mixed gas is constantly changing. When the VOC reaches the explosion ratio, it will explode when it encounters the flame of the combustion device. When installed, it will cause a more intense explosion and cause a major safety accident;

Fourth, in the prior art, the position of the flame combustion head is usually kept unchanged. When the VOC mixed gas concentration is high, the ordinary flame nozzle provides the desired heat.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the purpose of the present invention is to provide an atmospheric diffusion type VOC tail gas combustion device and a combustion method thereof.

The technical solution of the present invention is achieved as follows: an atmospheric diffusion type VOC tail gas combustion device, comprising a combustion device body and a VOC air intake pipe communicated with the combustion device body, characterized in that: the combustion device body includes a natural air intake port the outer box and inner box;

The output end of the VOC air intake pipe passes through the outer box body and penetrates into the inner box body; the top of the outer box body is provided with a Laval nozzle structure to form a first exhaust port;

The inner top of the inner box is provided with a second exhaust port, and the bottom is provided with a combustion component for burning VOC gas.

Preferably, the output end of the VOC intake pipe is inclined upward and communicated tangentially with the inner box body, and the VOC gas enters the inner box body in an upward swirling manner.

Preferably, a high-temperature heat storage body for storing heat is arranged above the output port of the inner box; the high-temperature heat storage body includes at least one piece of metal mesh with longitudinal honeycomb-shaped exhaust holes.

The high temperature heat accumulator can also use at least one piece of high temperature resistant ceramics with longitudinal honeycomb vent holes.

Preferably, the combustion assembly includes a flame nozzle, a telescopic structure for driving the flame nozzle to reciprocate longitudinally, and a fuel supply system for supplying fuel;

The output end of the flame nozzle extends into the inner box through the bottom of the outer box and the bottom of the inner box in turn, and the flame nozzle is longitudinally slidably arranged with the bottom of the outer box and the bottom of the inner box;

The telescopic structure is a longitudinal cylinder installed on the ground through a base.

Preferably: the fuel supply system includes a fuel storage tank and a proportional valve; the fuel storage tank communicates with the flame nozzle input through a fuel transport pipe, and the proportional valve is mounted on the fuel transport pipe for controlling the flow of fuel quantity.

Preferably, the fuel supply system further includes an intelligent control system that automatically controls the proportional valve;

The intelligent control system includes a controller and a temperature sensor for detecting the temperature of the high-temperature heat accumulator; and the temperature sensor, the controller and the proportional valve are connected by wires to form a temperature control loop.

Preferably, the output end of the VOC intake pipe is provided with a blocking device for users to prevent gas backflow; the blocking device includes a water seal valve and/or a one-way valve.

Compared with the prior art, the beneficial effects brought by the present invention are:

1. By changing the traditional method of directional and quantitative air supply of exhaust fans to the method of atmospheric diffusion type natural inhalation, the advantage of this method is that it can adapt to the amount of oxygen required when the VOC concentration inside the combustion device is burned, and automatically inhale. This method effectively solves the problem of VOC and insufficient combustion in the traditional directional delivery of quantitative air; effectively eliminates the odor in the workshop and improves the working environment of the workshop;

2. A high-temperature regenerator is arranged above the output port of the inner box. The high-temperature regenerator can effectively store the heat generated by the combustion head. When the VOC gas burned by the combustion device moves upwards, it enters the high-temperature regenerator. The heat body is discharged along the honeycomb air outlet on the high temperature heat storage body. During the process of passing through the high temperature heat storage body, the VOC gas can be further burned and decomposed to further improve the purification treatment effect of the VOC gas and further solve the problem. Odor problem caused by insufficient combustion of VOC gas;

3. By setting the traditional flame head in the form of vertical expansion, in this way, the height of the flame nozzle can be adjusted according to the actual concentration of VOC gas, so as to better adapt to the change of VOC gas concentration. In addition, By adjusting the height of the flame nozzle, it is also possible to adjust the temperature of the metal mesh, and further, to better adapt to changes in VOC gas concentration.

It should be noted that the combustion device is also provided with a fuel supply system. The fuel supply system can measure the temperature change of the high-temperature regenerator through a temperature sensor, and use this data to drive the controller to control the opening size of the proportional valve to achieve Control fuel supply; further adapt to changes in VOC gas concentration.

4. By setting a water seal valve and a single cut at the input end of the VOC intake pipe, in this way, it can prevent the chain reaction caused when the VOC gas concentration inside the combustion device reaches the explosion ratio, and avoid the occurrence of major safety hazards.

In addition, the present invention also discloses an atmospheric diffusion type VOC tail gas combustion method, which is characterized by comprising the following steps:

S1 transports the VOC exhaust gas through the VOC intake pipe into the inner box, and swirls to the

run on;

The VOC gas in the inner box of S2 will be burned by the flame of the flame nozzle, and during the combustion process, the natural suction port is naturally inhaled, and the outside air is adaptively inhaled into the combustion chamber for automatic

Adapt to auxiliary combustion;

The VOC exhaust gas after S3 combustion passes through the high temperature regenerator to achieve the temperature required for complete combustion, and then is discharged to the outside.

Preferably, in the combustion process of the step S2, the flame nozzle can be controlled to move longitudinally through the telescopic structure, so as to adapt to the concentration of the VOC exhaust gas.

Preferably, in the combustion process of the step S2, the flame nozzle can self-adapt the concentration of the VOC exhaust gas through the fuel supply system according to the temperature of the high temperature regenerator, so as to realize the effect of adaptively adapting the concentration of the VOC exhaust gas.

The beneficial effects of the VOC tail gas combustion method provided by the present invention are:

By adopting the above-mentioned combustion method and using the atmospheric diffusion type natural inhalation method, in the process of use, the required air can be matched according to the concentration of VOC, which can effectively improve the combustion effect of VOC gas and effectively solve the odor in the workshop question,

In addition, by adjusting the height of the flame nozzle and controlling the fuel output, it can effectively adapt to the changing VOC gas concentration; improve the combustion efficiency and improve the environmental protection effect.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of a specific embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a combustion assembly.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

As shown in FIG. 1 , the present invention discloses an atmospheric diffusion type VOC exhaust gas combustion device, which includes a combustion device body 1 and a VOC intake pipe 2 communicated with the combustion device body 1. In a specific embodiment of the present invention, the combustion device The main body 1 includes an outer casing 11 and an inner casing 12 with a natural suction port 100;

The output end of the VOC air intake pipe 2 passes through the outer box body 11 and penetrates into the inner box body 12; the top of the outer box body 11 is provided with a Laval nozzle structure 111 to form a first exhaust port 112;

The bottom of the outer box is set to a Laval nozzle structure. In this setting, the gas passing through the Laval nozzle structure will speed up the flow rate, and a negative pressure will be generated in this area. The natural suction port is used inside the combustion chamber to achieve the effect of atmospheric diffusion type natural suction; while saving energy, it avoids external electrical equipment and avoids the unsafe hidden dangers of electrical equipment due to high temperature.

A second exhaust port 121 is provided at the top of the inner box 12 , and a combustion assembly 3 for burning VOC gas is provided at the bottom.

In a specific embodiment of the present invention, the output end of the VOC intake pipe 2 is inclined upward and communicated tangentially with the inner box 12 , and the VOC gas enters the inner box 12 in an upward swirling manner.

Compared with the prior art, the beneficial effects brought by the present invention are:

1. By changing the traditional method of directional and quantitative air supply of exhaust fans to the method of atmospheric diffusion type natural inhalation, the advantage of this method is that it can adapt to the amount of oxygen required when the VOC concentration inside the combustion device is burned, and automatically inhale. This method effectively solves the problem of VOC and insufficient combustion in the traditional directional delivery of quantitative air; effectively eliminates the odor in the workshop and improves the working environment of the workshop;

Secondly, it should be noted that the output end of the VOC intake pipe is inclined upward and is tangentially connected to the inner box, and the gas entering the inner box will be swirl upward and discharged, so as to prevent the VOC exhaust gas from running along the outlet at the bottom of the inner box. out to ensure that the VOC gas can be completely burned.

Embodiment 2, and embodiment 1, the difference is

As shown in FIG. 2, in the specific embodiment of the present invention, a high-temperature heat storage body 4 for storing heat is provided above the output port of the inner box 12; Metal mesh with longitudinal honeycomb vents.

In a specific embodiment of the present invention, the combustion assembly 3 includes a flame nozzle 31, a telescopic structure 32 for driving the flame nozzle 31 to reciprocate longitudinally, and a fuel supply system 33 for supplying fuel;

The output end of the flame nozzle 31 extends into the inner box 12 through the bottom of the outer box 11 and the bottom of the inner box 12 in turn, and the flame nozzle 31 is longitudinally slidably arranged with the bottom of the outer box 11 and the bottom of the inner box 12;

The telescopic structure 32 is a longitudinal cylinder installed on the ground through a base.

In a specific embodiment of the present invention, the fuel supply system 33 includes a fuel storage tank 331 and a proportional valve 332; the fuel storage tank 331 communicates with the input end of the flame nozzle 31 through a fuel transport pipe 333, and the proportional valve 332 Installed on the fuel transport pipe 333 to control the flow of fuel.

In a specific embodiment of the present invention, the fuel supply system 33 further includes an intelligent control system 5 that automatically controls the proportional valve 332;

The intelligent control system 5 includes a controller 51 and a temperature sensor 52 for detecting the temperature of the high temperature regenerator 4; and the temperature sensor 51, the controller 52 and the proportional valve 332 are connected by wires to form a temperature control loop.

In the specific embodiment of the present invention, the output end of the VOC intake pipe 12 is provided with a blocking device 6 for users to prevent gas backflow; the blocking device 6 includes a water seal valve and a one-way valve.

The beneficial effects of this embodiment are:

1. A high-temperature heat storage body is arranged above the output port of the inner box. The high-temperature heat storage body can effectively store the heat generated by the combustion head. When the VOC gas burned by the combustion device moves upward, it enters the high-temperature heat storage body. The VOC gas can be further burned and decomposed during the process of passing through the high temperature regenerator, which can further improve the purification effect of VOC gas and further solve the problem of Odor problem caused by insufficient combustion of VOC gas;

2. By setting the traditional flame head in the form of vertical expansion, in this way, the height of the flame nozzle can be adjusted according to the actual concentration of VOC gas, so as to better adapt to the change of VOC gas concentration. In addition, By adjusting the height of the flame nozzle, it is also possible to adjust the temperature of the metal mesh, and further, to better adapt to changes in VOC gas concentration.

It should be noted that the combustion device is also provided with a fuel supply system. The fuel supply system can measure the temperature change of the high-temperature regenerator through a temperature sensor, and use this data to drive the controller to control the opening size of the proportional valve to achieve Control fuel supply; further adapt to changes in VOC gas concentration.

3. By setting a water seal valve and a single cut at the input end of the VOC intake pipe, in this way, it can prevent the chain reaction caused when the concentration of VOC gas inside the combustion device reaches the explosion ratio, and avoid large potential safety hazards.

Example 3

In addition, the present invention also discloses an atmospheric diffusion type VOC tail gas combustion method, which is characterized by comprising the following steps:

S1 transports the VOC exhaust gas into the inner box through the VOC intake pipe, and runs upwards in a swirling flow;

The VOC gas in the inner box of S2 will be burned by the flame of the flame nozzle, and during the combustion process, the natural suction port will carry out natural suction, and the outside air will be adaptively sucked into the combustion chamber for adaptive auxiliary combustion;

The VOC exhaust gas after S3 combustion passes through the high temperature regenerator to achieve the temperature required for complete combustion, and then is discharged to the outside.

Preferably, in the combustion process of the step S2, the flame nozzle can be controlled to move longitudinally through the telescopic structure, so as to adapt to the concentration of the VOC exhaust gas.

Preferably, in the combustion process of the step S2, the flame nozzle can self-adapt the concentration of the VOC exhaust gas through the fuel supply system according to the temperature of the high temperature regenerator, so as to realize the effect of adaptively adapting the concentration of the VOC exhaust gas.

The beneficial effects of the VOC tail gas combustion method provided by the present invention are:

By adopting the above-mentioned combustion method and using the atmospheric diffusion type natural inhalation method, the combustion effect of VOC gas can be effectively improved, and the problem of odor in the workshop can be effectively solved.

In addition, by adjusting the height of the flame nozzle and controlling the fuel output, it can effectively adapt to the changing VOC gas concentration; improve the combustion efficiency and improve the environmental protection effect.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. an atmospheric diffusion type VOC tail gas combustion device, comprising a combustion device body and a VOC air intake pipe that communicates with the combustion device body, it is characterized in that: the combustion device body comprises an outer casing and an inner casing with a natural suction port ; The output end of the VOC air intake pipe passes through the outer box body and penetrates into the inner box body; the top of the outer box body is provided with a Laval nozzle structure to form a first exhaust port; The inner top of the inner box is provided with a second exhaust port, and the bottom is provided with a combustion component for burning VOC gas. 2. An atmospheric diffusion type VOC tail gas combustion device according to claim 1, characterized in that: the output end of the VOC intake pipe is inclined upward and communicated tangentially with the inner box, and the VOC gas enters in an upward swirling manner. in the inner box. 3. The atmospheric diffusion type VOC exhaust gas combustion device according to claim 2, wherein: a high temperature heat storage body for storing heat is arranged above the output port of the inner box; the high temperature heat storage body comprises at least A piece of metal mesh and/or refractory ceramic with longitudinal honeycomb vents. 4. An atmospheric diffusion type VOC exhaust gas combustion device according to claim 3, wherein the combustion assembly comprises a flame nozzle, a telescopic structure for driving the flame nozzle to reciprocate longitudinally, and a fuel for supplying fuel supply system; The output end of the flame nozzle extends into the inner box through the bottom of the outer box and the bottom of the inner box in turn, and the flame nozzle is longitudinally slidably arranged with the bottom of the outer box and the bottom of the inner box; The telescopic structure is a longitudinal cylinder installed on the ground through a base. 5. An atmospheric diffusion type VOC exhaust gas combustion device according to claim 4, characterized in that: the fuel supply system comprises a fuel storage tank and a proportional valve; the fuel storage tank passes through a fuel transport pipe and a flame nozzle. The input end communicates, and the proportional valve is installed on the fuel delivery pipe for controlling the flow of fuel. 6. An atmospheric diffusion type VOC tail gas combustion device according to claim 5, characterized in that: the fuel supply system further comprises an intelligent control system that automatically controls a proportional valve; The intelligent control system includes a controller and a temperature sensor for detecting the temperature of the high-temperature heat accumulator; and the temperature sensor, the controller and the proportional valve are connected by wires to form a temperature control loop. 7. A kind of atmospheric diffusion type VOC tail gas combustion device according to claim 6, it is characterized in that: the output end of described VOC air inlet pipe is provided with the blocking device that user prevents gas backflow; This blocking device comprises water seal valve and/ or one-way valve. 8. an atmospheric diffusion type VOC tail gas combustion method is characterized in that: comprise the following steps: S1 transports the VOC exhaust gas into the inner box through the VOC intake pipe, and runs upwards in a swirling flow; The VOC gas in the inner box of S2 will be burned by the flame of the flame nozzle, and during the combustion process, the natural suction port will carry out natural suction, and the outside air will be adaptively sucked into the combustion chamber for adaptive auxiliary combustion; The VOC exhaust gas after S3 combustion passes through the high temperature regenerator to achieve the temperature required for complete combustion, and then is discharged to the outside. 9. A kind of atmospheric diffusion type VOC tail gas combustion method according to claim 8, is characterized in that: in the combustion process of described step S2, the flame nozzle can control its longitudinal movement through the telescopic structure, with this adaptation VOC tail gas. concentration. 10. An atmospheric diffusion type VOC tail gas combustion method according to claim 8, characterized in that: in the combustion process of the step S2, the flame nozzle can be self-adapted according to the temperature of the high temperature regenerator through the fuel supply system The concentration of VOC exhaust gas achieves the effect of adaptively adapting to the concentration of VOC exhaust gas.

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